38 lines
1.3 KiB
Python
38 lines
1.3 KiB
Python
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# This file is part of Hypothesis, which may be found at
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# https://github.com/HypothesisWorks/hypothesis/
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#
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# Copyright the Hypothesis Authors.
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# Individual contributors are listed in AUTHORS.rst and the git log.
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#
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# This Source Code Form is subject to the terms of the Mozilla Public License,
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# v. 2.0. If a copy of the MPL was not distributed with this file, You can
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# obtain one at https://mozilla.org/MPL/2.0/.
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import os
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def guess_background_color():
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"""Returns one of "dark", "light", or "unknown".
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This is basically just guessing, but better than always guessing "dark"!
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See also https://stackoverflow.com/questions/2507337/ and
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https://unix.stackexchange.com/questions/245378/
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"""
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django_colors = os.getenv("DJANGO_COLORS", "")
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for theme in ("light", "dark"):
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if theme in django_colors.split(";"):
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return theme
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# Guessing based on the $COLORFGBG environment variable
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try:
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fg, *_, bg = os.getenv("COLORFGBG").split(";")
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except Exception:
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pass
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else:
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# 0=black, 7=light-grey, 15=white ; we don't interpret other colors
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if fg in ("7", "15") and bg == "0":
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return "dark"
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elif fg == "0" and bg in ("7", "15"):
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return "light"
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# TODO: Guessing based on the xterm control sequence
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return "unknown"
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